DEA Presentation 100316
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This document discusses issues with conventional blade stabilizers such as poor BHA response, damage, and hole quality. It introduces a new enhanced stabilizer called Switchblade that aims to address these issues through improved hydrodynamic design, weight transfer abilities, and a robust retention system. Field testing results are presented showing the Switchblade performing well with less vibration, balling, and stabilizer wear across over 7,000 hours of drilling 20 wells internationally. Fixedblade stabilizers are also discussed for lower-cost applications with known gauge diameters.
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DEA Presentation 100316
- 1. The Relevance of the Most Irrelevant BHA and Drillstring Component (Why I decided to mess with the conventional blade stabiliser) Tom Newman March 10th 2016
- 2. Directional Problems BAT-2 Downhole Dynamics Poor BHA response, energy transfer & MWD Interference BHA Damage MWD/LWD, PDM, RSS failures, excessive stabiliser wear Poor Hole Quality Poor energy transfer, trip time (ledges), csg running issues Vibration Related Issues
- 3. Whirl as Shape Is a sine wave Bit tilted by wave, reduces ROP & increases MSE Shape crosses wellbore = quiet (nodes) Mechanical Specific Energy best indicator Source: Fred Dupriest, Thus the Lowly Stabiliser
- 5. Fit for Purpose Solution?
- 7. Static Flow Modelling Research
- 8. Rotational 100 rpm Flow Modelling Research
- 11. Pull and push Test blade Test boltsTest bolts
- 12. Final Retention System An integral, interference fit pin, with precision radii and a locking bolt array
- 13. Run History Run in Dutch North Sea, UAE, KSA, France, Turkey, and Belgium Less balling up, stick/slip, vibration & little wear with more stable torque. All other BHA components in good condition. Wells drilled 20 Hours drilled > 7,000 hrs Meters drilled > 56,000m / 183,000ft
- 14. Case History: Weight Transfer & Less Balling Dutch North Sea OBJECTIVE: 16" hole section 659m - 1,566m Motor BHA (1.15° ABH) + 2 x Switchblades 15" & 15 ¼" Build to and hold @ 25˚ inclination CONCERNS: Packing off Balling
- 15. Case History: Weight Transfer & Less Balling DRILLING OBSERVATIONS: No motor stalls No hanging up Good tool face control POOH OBSERVATIONS: No clay ball problems No packing off
- 16. Fixedblade Known gauge ODs Tangent sections Lower cost applications
- 17. Case History: Weight Transfer & Less Balling Western Gulf Region OBJECTIVE: 8 1/2" hole section 6,428ft – 9,598ft Motor BHA (1.50° ABH) + 1 x Fixedblade 7 7/8" (8") Hold horizontal with azimuthal left turn @ 27˚ CONCERNS: Sliding ROP Torque levels
- 18. Case History: Weight Transfer & Less Balling Run Results (Spiralblade vs. Fixedblade) Backflow induced packing off (L0 above) Minimal surface weight transfer / hang up POOH No motor stalls
- 19. Cross Section Comparison To see full simulation go to: https://youtu.be/eRcm44-JVok
- 20. Questions?